“Extraversion is part of the male toolkit for mating success. It is especially useful in societies where a high incidence of polygyny means too many men must compete for too few women.”

soooo … in an earlier post i pointed out that both austrian and png men decorate themselves with bird feathers but in sliiiiiightly different ways (and with different types of bird feathers, of course, dependent upon what sorts of birds live in austria vs. png).

i wondered why the differences? why are the pngers so much more ostentatious?

maybe i’ve got an answer to that question now. pngers are polygamous while austrians … eh, not so much. so, pngers are naturally (literally) more extraverted than austrians.